Performance optimization of a wireless multimedia transmission system based on the reduction of PAPR

Communication systems have evolved in recent years, especially wireless systems, and more and more the need to use a large data transmission speed is needed. But existing technology are constraints to monitor progress of the necessary transmission speed; several methods and techniques have been developed to address this problem. Orthogonal frequency division multiplexing (OFDM) is an alternative due to its robustness against selective frequency fading and its resistance to inter-symbol interference (ISI).The latter (ISI) is a problem in high-speed data communication. The emission for long range wireless systems requires the use of power amplifiers, but the use of OFDM systems, among others, exhibits high amplitude peaks of the modulated signal envelope and therefore variations Important in instantaneous power. For OFDM systems, the Peak-to-Average Power Ratio (PAPR) parameter which has a direct influence on the power amplifier must be taken into consideration. PAPR reduction techniques include techniques for processing the signal prior to transmission. These methods are usually simple to implement. In this work, we talk about different methods of reducing PAPR.